666000431 has 4 divisors (see below), whose sum is σ = 666065664. Its totient is φ = 665935200.

The previous prime is 666000371. The next prime is 666000473. The reversal of 666000431 is 134000666.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 666000431 - 2¹⁰ = 665999407 is a prime.

It is a super-2 number, since 2×666000431² = 887113148184371522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 666000431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666000131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13610 + ... + 38951.

It is an arithmetic number, because the mean of its divisors is an integer number (166516416).

Almost surely, 2^666000431 is an apocalyptic number.

666000431 is a deficient number, since it is larger than the sum of its proper divisors (65233).

666000431 is a wasteful number, since it uses less digits than its factorization.

666000431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65232.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 666000431 is about 25806.9841515819. The cubic root of 666000431 is about 873.2893625118.

The spelling of 666000431 in words is "six hundred sixty-six million, four hundred thirty-one", and thus it is an aban number.